38.8.34 Rx Buffer / FIFO Element Size Configuration
This register is write-restricted and only writable if bit fields CCCR.CCE = 1 and CCCR.INIT =
1.
Configures the number of data bytes belonging to an Rx Buffer / Rx FIFO element. Data field
sizes >8 bytes are intended for CAN FD operation only.
Name:
RXESC
Offset:
0xBC
Reset:
0x00000000
Property:
Write-restricted
Bit
31
30
29
28
27
26
25
24
Access
Reset
Bit
23
22
21
20
19
18
17
16
Access
Reset
Bit
15
14
13
12
11
10
9
8
RBDS[2:0]
Access
R/W
R/W
R/W
Reset
0
0
0
Bit
7
6
5
4
3
2
1
0
F1DS[2:0]
F0DS[2:0]
Access
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
Bits 10:8 – RBDS[2:0] Rx Buffer Data Field Size
In case the data field size of an accepted CAN frame exceeds the data field
size configured for the matching Rx Buffer, only the number of bytes as configured by RXESC are
stored to the Rx Buffer element. The rest of the frame’s data field is
ignored.
Value
Name
Description
0x0
DATA8
8 byte data field.
0x1
DATA12
12 byte data field.
0x2
DATA16
16 byte data field.
0x3
DATA20
20 byte data field.
0x4
DATA24
24 byte data field.
0x5
DATA32
32 byte data field.
0x6
DATA48
48 byte data field.
0x7
DATA64
64 byte data field.
Bits 6:4 – F1DS[2:0] Rx FIFO 1 Data Field Size
In case the data field size of an accepted CAN frame exceeds the data field
size configured for the matching Rx FIFO 1, only the number of bytes as configured by RXESC are
stored to the Rx FIFO 1 element. The rest of the frame’s data field is
ignored.
Value
Name
Description
0x0
DATA8
8 byte data field.
0x1
DATA12
12 byte data field.
0x2
DATA16
16 byte data field.
0x3
DATA20
20 byte data field.
0x4
DATA24
24 byte data field.
0x5
DATA32
32 byte data field.
0x6
DATA48
48 byte data field.
0x7
DATA64
64 byte data field.
Bits 2:0 – F0DS[2:0] Rx FIFO 0 Data Field Size
In case the data field size of an accepted CAN frame exceeds the data field
size configured for the matching Rx FIFO 0, only the number of bytes as configured by RXESC are
stored to the Rx FIFO 0 element. The rest of the frame’s data field is
ignored.
Value
Name
Description
0x0
DATA8
8 byte data field.
0x1
DATA12
12 byte data field.
0x2
DATA16
16 byte data field.
0x3
DATA20
20 byte data field.
0x4
DATA24
24 byte data field.
0x5
DATA32
32 byte data field.
0x6
DATA48
48 byte data field.
0x7
DATA64
64 byte data field.
The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.
